Grain bin vent cover



FIG. 1 is a perspective view of a grain bin vent cover showing my new design in use;

FIG. 2 is a perspective view thereof showing the cover broken away to display the internal structure;

FIG. 3 is a left side elevation thereof, the right side being a mirror image;

FIG. 4 is a top plan view thereof,

FIG. 5 is a rear end view thereof,

FIG. 6 if a front end view thereof; and,

FIG. 7 is bottom plan view thereof.

The broken line showing the grain bin in FIG. 1 is included for the purpose of illustrating use and environment and forms no part of the claimed design. 

CLAIM The ornamental design for a grain bin vent cover, as shown and described. 